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free flow exhaust [Archive] - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

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blkdout05
06-05-2008, 07:22 PM
what is a good exhaust?I dont want anything loud just something that will flow better for more mpg's

ScarabEpic22
06-05-2008, 07:26 PM
Then stay stock, the stock system is pretty free-flowing and matches the I6 engine well. All the aftermarket systems WILL increase sound, no way around it. And I highly doubt you will get more than .5mpg better with an exhaust. Get a PCM tune and an intake, those will be cheaper for both and give you better mileage.

idreama300
06-05-2008, 07:44 PM
Exhaust wont increase your MPG's and will increase the sound. If you're still interested I think the Magnaflow duals are the quietest and look the best, but not the cheapest.

tbon221988
06-07-2008, 12:22 AM
Exhaust wont increase your MPG's and will increase the sound. If you're still interested I think the Magnaflow duals are the quietest and look the best, but not the cheapest.



possibly, but I beg to differ with my Gibson cat-back. The stock system restricts a whole lot more than it seems. The Gibson is affordable, quiet, and from my experience, gave me better MPG with my CAI

trxman
06-08-2008, 11:44 AM
i love my gibson. only like $315 and it gives you a some more MPG. It sound great at high RPM and at idle it's not bad at all.

--john--

TXBlazer
06-09-2008, 11:18 AM
Start with hacking off the resonator and putting on a straight pipe, go from there.:thumbsup: